Evaporating-pan.



No. 684,242. Patented Oct. 8, |90I. y

J. H. HILL & J. RIVETT.

EVAPORATING PAN.

(Application med Apr. 25, 1961,)

2 Sheets-Sheet l.

- Patented Dot. 8, |901. J. H. HILL J. RivVETT. EvAPonATING PAN.

(Application led Apr. 25, 1901.)

2 Sheets-Sheet 2.

ying (No Model.)

'xmwmmw Hag#- @a a? A mms. 93M im UNITED STATES PATENT OrrrcE.

JAMES H. HILL AND JOHN RIVETT, OF HORSESHOE, NET YORK. l

EvAPoRATlNG-PAN.

srncrrrcn'rron forming para of Letters Patent No. 684,242, dated October 8 1901.

Application filed April 25, 1901. Serial No. 57,402. (No model.)

To @ZZ whom it may con/cern:

Be it known that we, JAMES H. HILL and JOHN RIVETT, citizens of the United States, residing at Horseshoe, St. Lawrence county, and State of New York, have invented certain new and useful Improvements in Evaporating-Pans, of which the following is a specification sufficient to enable others skilled in the art to which the invention appertains to make and use the same.

Our invention relates more particularly to evaporating-pans for heating maple-sap, the main object being to maintain prescribed levels in several successive pans by means which are automatic, at the same time rendering the apparatus comparativelyv simple and cheap as well as effective.

The invention consists in the special construction and arrangement of parts herein described and claimed specically.

In the accompanying drawings, Figure 1 is a plan of our improved apparatus; Fig. 2, a side elevation thereof; Fig. 3, a vertical longitudinal section upon plane of line 3 3, Fig. l; Fig. 4, a transverse section upon plane of line 4 4, Fig. 2. Fig. 5 is a sectional elevation, upon an enlarged scale, showing clearly the mechanism for automatically regulating the level of the sap within adjoining pans.

A B C represent three evaporatingpans supported upon any suitable frame D, the pans being arranged successively on different planes. The sap is fed into the first pan A from an elevated tank c, in which it is subjected to a preliminary heating by a coil ofy steam-pipe e. Each evaporating-pan is also provided with a coil of steam pipe in the usual way and with gages G and thermometers T for the purpose of indica-ting the level of the sap and the temperature thereof. The sap is conducted from one pan to another through a pipe or conduit I), controlled by a gate-valve p. This valve is operated by a lever L, pivotally supported upon a bracket Z or other stationary part of the apparatus. The lever carries two floats F F', the rods of which are adjustable upon the lever L. The fulcruin of the lever L may also be made adjustable, as shown, thus providing for a universal adjustment by which the parts may be regulated with accuracy with relation to the work to be done.

It is obvious that in operation the lower end of the iioat F in pan B will tend to raise the gate-valve p and from it an increased flow of sap, whereas as the float F is raised by the inow of the sap it will tend to close the gatevalve. In like manner as the level of the sap raises in the pan A it will tend to raise the gate-valve p, and vice versa, the action of the floats tending constantly to maintain a uniform level in all the pans.

The horizontal and'vertical adjustment of the evaporating-pans A B C is effected by means of the set-screws S S, or by any equivalent mechanical expedient. The partitions I in the pans insure a circuitous course for the sap and a uniform heating thereof.

What we claim as our invention, and desire to secure by Letters Patent, is

l. In evaporating apparatus, the combination of two or more evaporating-pans, one upon a higher plane than the other, a conduit for feeding the sap from the higher pan to the lower pan, a valve controlling said conduit, a rod connected with said valve and with a controlling lever, said controlling-lever, a iioat in the upper pan connected with said controlling-lever, and a float in the lower pan connected with said controlling-lever, whereby the iiow of sap through the said conduit is controlled automatically, substantially as set forth.

2. In evaporating apparatus, the combination of two or more evaporating-pans upon different planes, a conduit for feeding the sap from a higher to alower pan, a valve controlling the flow of sap through said conduit, means for connecting said valve with a controlling-lever, a iioat in the upper pan connected with said controlling-lever, a float in the lower pan connected with said controlling'- lever, and means for adjusting the fulcrum of said controlling-lever for the purpose and substantially in the manner set forth.

3. In evaporating apparatus the combination of two or more evaporating-pans upon different planes, a conduit for feeding the sap from a higher to a lower pan, a valve con'- trolling said conduit, means for connecting said Valve adjustably with a con-tl'olling-lel trolling-lever, a float in an upper pan con;V

ver, e float in Jhe upper pan connected with l neoted with said controlling-lever, a float in said controlling-lever, and a. float iu the lower a lower pan connected with said controllingpan connected Wit-h said eontrolling-lever,f0r lever and means for adjusting either` one 0r the purpose and substantially in the manner both of said floats with relation to the eondesoribed. trolling-lever, for the purpose and substan- Ll. In evaporating apparatus, the eombinatially as herein set; forth.

tion of two or more eVaporating-pans upon JAMES H. HILL.

different planes, a conduit for feeding the sap JOHN RIVETT Witnesses:

from a. higher to a lower pan, a Valve controllng the ow of sap through said conduit, D. W. GARDNER,

means for connecting said Valve with e con- JOHN KIRN. 

